Kate Beckinsale in Bathing Suit Says "Everyone Relax"

Kate Beckinsale is not only beautiful, she has a great sense of humor. The 49-year-old actress posted a picture of herself in a one-piece swimsuit emblazoned with the Greggs logo (Greggs, for those not familiar with the UK brand, is a chain of bakeries famous for their sausage rolls). “Everyone relax -it is possible to take a Gregg’s swimsuit from day to night PANIC OVER,” Beckinsale captioned the post. How does she stay so fit? Read on to see 5 ways Beckinsale stays in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

1. No Carbs Or Sugar

Beckinsale doesn’t eat carbs or sugar because she doesn’t like how they make her feel. "They make me feel very sluggish," she told Delish. Beckinsale focuses her diet on protein and vegetables, which "suit my body nicely." Vegetables are packed full of antioxidants, experts say. “Research shows that flavonoids are also powerful nutrients and may help explain why plant-based diets are consistently associated with health benefits,” says Joyce Prescott, MS, RD, LD. “We think this is due, in part, to their antioxidant properties.”

2. She Does Circuit Training

Joe Maher/Getty Images

"I start out absolutely dreading it, do an incredibly punishing workout, bitch about it the whole time, and end up feeling 100 percent better when I leave," Beckinsale says. "Working out is basically nature's antidepressant. I do circuit training interspersed with brutal cardio, such as crazy things on a non-motorized treadmill. That part is torture. But the thing I like about circuit training is that you're never doing one thing for very long. You get to the point where you almost can't bear it, and it changes to something else."

3. She Works Out Early

Shutterstock

Beckinsale loves to start the day with a workout—the earlier the better. “Morning workouts tend to be completed by those who prefer to check exercise off their list for the day before the rest of the daily to-do’s, children's needs, busy gym or decrease in motivation hit them,” says Heather Milton, senior exercise physiologist at New York University’s performance lab.

4. She Doesn’t Drink Alcohol

Frazer Harrison/Getty Images

"I was a vegetarian for a really long time because I am incredibly squeamish about meat,” Beckinsale says. “But when I was filming Pearl Harbor, I didn't have enough energy, and the trainer I was working with at the time said 'You've got to start eating chicken and fish.' So I did, and that helped me. [daughter] Lily and I eat clean-we have a lot of sautéed vegetables like brussels sprouts and broccoli and chicken and fish. Also, I don't drink alcohol. I feel [its effects] very quickly, so I've never actually had an entire glass of anything alcoholic."

5. She Loves Yoga

Beckinsale is a devotee of yoga, which experts say has benefits for both the body and mind. “Yoga is known for its ability to soothe tension and anxiety in the mind and body. But it can also have an impact on a person's exercise capacity,” says Harvard Health. “Researchers studied a small group of sedentary individuals who had not practiced yoga before. After eight weeks of practicing yoga at least twice a week for a total of 180 minutes, participants had greater muscle strength and endurance, flexibility and cardio-respiratory fitness.”